FA-31454 / Keyboard interactions / Member archive

Overlapping keyboard sequence matcher: Repeat or release events advance the logical key sequence · case 04

The event trace violates the repeat feed rule and produces incorrect keyboard state or command output.

Member previewVariant 4 · 3 implementations · 10 checks per implementation

Case contract

Case [sequence,timeout,events]. Nonempty sequence is list of key names. Events [kind,key,time,repeat]. Only nonrepeat down feeds matcher. Accepted downs more than timeout after the previous accepted down discard the prefix; tick likewise expires it. Cancel resets prefix and clock. Keep longest suffix matching a sequence prefix, and after a match retain the longest proper overlapping prefix. Return match timestamps, partial prefix and last accepted time. Inputs are finite ordered event traces; return the stated deterministic state. Batch entries are independent. N varies the number of independent input transactions.

Why this case matters

Controlled keyboard event processing model for debugging application event logic.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
sequence-prefix scenario 4	`[[[11], [], 11], [[11], [], 11], [[11], [], 11], [[11], [], 11]]`	`[[[], ["A"], 10], [[], ["A"], 10], [[], ["A"], 10], [[], ["A"], 10]]`	Failed

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This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

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